Dan ed,
Currently my TT is resting on cut-up MDF pieces in my sandbox. As you suggest I need to try some exotic wood on top of the sand.
The fellow who turned me on to the springs had cement floors like you & was surprised by the improvement. Moreover, if you've got any vibration-generating equipment in the rack below the TT(e.g. AC powered devices), the springs above will decouple them from the vinyl. I would also think that most racks act as antennas for airborne sound waves. And then there's seismic activity & traffic on nearby roads.
Currently my TT is resting on cut-up MDF pieces in my sandbox. As you suggest I need to try some exotic wood on top of the sand.
The fellow who turned me on to the springs had cement floors like you & was surprised by the improvement. Moreover, if you've got any vibration-generating equipment in the rack below the TT(e.g. AC powered devices), the springs above will decouple them from the vinyl. I would also think that most racks act as antennas for airborne sound waves. And then there's seismic activity & traffic on nearby roads.